Grindstone honing device



July 31, 1928.

1,679,200 N. M. BAKER GRINDSTONE HONING DEVICE 3 Shee Filed Aug. 6," 1923 INVEN P NELS ON I. BAKER I BY gig/M23 mrdmm' July 31, 1928.

N. M. BAKER GRINDSTONE HONING DEVICE Filed Aug. s, 1925 3 Sheets-Sheet; 2

4 INVENTOR NELSON M. BAKER July 3.1, 19 28. I N M BAKE'R 1,679,200 enmnswonfi noume DEVICE Filed Aug. e, 1923 ,3 Sheets-Sheet 3 INVENTOR NELSON M. BAKER BY I 94% 7& C7

ATT RNEY Patented July 31, 1928.

UNITED STATES eiazui Pa r NT OFFICE};

NELSON M. BAKER, or SOUTI-IBRIZJG-E, Mass eoI-iusntr'rs, nssreivon :ro AMERIC N or- TIOAL COMPANY,' or soUr-ennitnen, iinssaonusnrrs, A VOLUNTARY ASSOCIA- TION or MASSACHUSETTS.

enmnsroivn HONINGV DEVICE.

A lication-filed August 6, 1923. Serial No. 656,009.

This invention relates to an improved grind-stone honing device, andhas particular reference to a hone adapted for use on a, bevel edging machine employing a- V-shape'd stone, although the invention may be used in conjunction with any type of grind-stone, or the like.

The process of sizing and of bevelling of lenses is necessarily a delicate and pain taking one, a-ndrequires that the lenses be held between suitable clamping heads by friction alone, and the pressure of contact of the lenses with the grind-stone must,

therefore, be light and substantially uniform to prevent displacement of the lenses with reference to their clamping heads. It

. will be seen that this requirement necessitates having a stone, the faces of whichare absolutely free from grooves, or the like.

A very important object of thisinvention is to provide a honing device-tobe used in conjunction with a grind-stone that Wlll )ositivel )revent the forming of grooves .V l o i "in the stone, and which'may be in'ade'to contact with the grinding faces of the stone at 'all times, but if it is desired the honing portions may be moved away from the stone.

Another very important object of the invention is to provide a honing device that is especially well adapted for use on a V shaped stone, and to this end a hone is provided for each face thereof, and means are associated therewith whereby both hones maybe adjusted to and from thestone simultaneously so that the same honing effect may be had on'both grinding faces of the stone, for obvious reasons.

Another important feature of the inven ti'onis that of having the bones reciprocated across the entire face of the stone, so that theentire face will be smooth, as well'as' making the apex of the stone constant.

' A still further object of the invention is to provide a'honing device of this character which is exceptionally strong, durable, comparatively inexpensive in construction, and which is particularly well adapted to the uses for which it is designed.

Other important objects of thef nvention will becomeapparent during the course of the following description.

' In the drawings, wherein like numerals throughout the same:

I Figurefiis a fragmentary thereof. 1

are employed to designate plan view of my insubstantially on 1ine4-4' of'Figure 3 and looking in the directionof the arrow.

like parts Figure 5 s a top plan view of the inven'tion showing the means for simultaneously moving the hone portions to and from the stone, and v ,1.

sectional detail In the drawings, wherein for the purpose of illustration,

a housing'13 through which is journaled a shaft 14, which is disposed transverselyof the stone and'is provided at one end with the sprocketwheel 15, over which is trained a sprocket chain 16 which derives powerfromi the sprocket wheel 17 which is carried by one end of the shaft 11.

20 j ournaled invthe housing 13', and arranged at right angles to the shaft 14. Nearthe "opposite end of the :stub shaft 20 is keyed a bevelled pinion 21 which meshes respecs tively with the bevelled pinions 22 and-23.- The pinions 22 and 23, respectively, are mounted on the inner endof the shafts 24 and 25, respectivelyywhich shafts "are so disposed as to be arranged p'arallel'to their respective cutting faces of the grinding stone 10; The shafts 24and 25, of coursefpass through suitable sleeves 26 formed integral with the housing 13, as is clearly illustrated' in Figure ofthe drawings. The outer ends of theshafts 24 and25 are provided with the cams 27. The upper end of the housing 13 that is, the portion disposed above the is shown the preferredem bodiment vof the invention, the numeral 10 designates the grinding stone, which is illus- I trated as a V-shaped stone, being carried on theshaft 11 arranged in suitable bearings 12.

- Arranged in'proximity to the stone 10 is 11 The housing 13 has a cut out portion immediately in front riage 29'is reciprocated along the dove-tail rib 28 in such a manner that the honing portion 31 will traverse the entire width of the grinding surface of the stone 10. It will, of-course, be seen that the pitch of'the cam 27 will be dependent upon the width of the face of the stone and the size of the honing member used.

It' will be seen that the power is derived through the medium of the sprocket chain and sprocket wheels, by which means the shaft 14 upon which the worm 18 is keyed will be rotated so as to impart a rotary motion to the shaft 20 by reason of the worm wheel 19 meshing with the worm. In this manner the pinion 21 which is carried by the opposite end of the shaft will impart movement to the pinions 22 and 23, which are carried by the shafts 24 and 25 which have at their opposite ends the earns 27 sowthat a reciprocatory movement is given to the honing carriages whereby the hones are reciprocated across the faces of the stone 10. Due to the arrangement of the cams 27, as illustrated in Figure 1 of the drawthe hones 31 will be reciprocated and maintained in the same relative spaced relation at all times during their operation.

It is very essential that hones'of the same properties and characteristice be selected for use in honing the "faces of the grind-stone,

and it is just as important to have means whereby the hones may be adjusted equally in order that .both faces of the stone may correspond. To this end' I have devised several unique means, one of which is shown I in Figure 3 of the drawings. In this form an arm 36 is formed integral with the carriage 32; The hone carriage 29 is provided with a threaded opening running throughout thev entire length, directly below the hone '31 and is adapted to receive the threaded end of the shaft 37 which is embraced on either sideby the forked ends of the arm 36, and

has on its outer end the operating wheel 38,

. by which means the hone carriage may be moved toandfrom the stone.

Of course, thumb nuts 40 are used to hold the hone 31 within the hone carriage 29.

In Figure 5 of the drawings is shown a modification by which means the hones are adjusted simultaneously. As can be seen, the

same structure is used as in the modification above described, except for the fact that a bevelled pinion or gear 41 is mounted on the outer end of the shaft 38instead of the hand wheel 39. Brackets 42 support the shafts 43, which shafts are arranged substantially parallel to the shaft 24 and 25, and are provided at their converging ends with the bevelled pinions 44 which mesh as at 45. Of course, the bevelled gears 45 are provided near the opposite ends and are adapted to mesh with the pinions 41. It will, of course, be recognized that the pinions 45 must be allowed to move with the pinions 41 as the carriage 29 reciprocates and to this end'the shafts 43 are provided with the elongated slots 46 through which the pins 47 extend,

as is shown at 46. The pins 47 are carried by,

In order to manipulate this arrangement the hand wheel 48 which carries the pinion 49 is so mounted that the pinion 49 will mesh with one of the pinions 44 and as the pinions 44 mesh, as at 45, the shafts 43 and adjuncts thereto will operate simultaneously so that thehones 31 will be moved to and from the stone simultaneously by a simple operation.

It will thus be seen that I have devised a very simple yet efficient means of maintaining a V-shaped stone in the required condition by means of a very simple honing device whichis operated with ease, and which is automatic in its nature as far asthe reciprocation of the hones is concerned.

It is to be understood that the form of my invention herewithshown and described is to be taken as the preferred embodiment of the same, and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of my invention or the scope of the subjoined claims,

I-Iaving'thus described my invention, what I claim is:

1. In combination with a grinding machine including a rotary stone, a housing arranged in front of the stone, a sleeve carried by the housing, a shaft arranged within the sleeve, a hone carriage associated with the sleeve, a cam carried by the shaft, means -to connect said hone carriage and cam, and

means to rot-ate said shaft whereby the hone carriage is reciprocated in the path of the a hone carriage having a dove-tail groove formed therein and adapted to receive the dove-tail rib, and cam means connecting the sleeve and hone carriage whereby the hone carriage is reciprocated by the rotation of the second shaft.

3. In combination with a grinding machine including a rotary stone, a housing arranged in front of the stone, a shaft journaled therethrough and arranged in alignment with the grinding stone, a Worm for turning the shaft, a bevelled pinion carried on the shaft, hone carriages reciprocally mounted above said housing and connected to said bevelled pinion, means to reciprocate the hones on rotation of the shaft and means to simultaneously adjust the hones to and from the stone 4. In combination with a grinding machine including a rotary stone, a pair of hones, means to reciprocate the hones simultaneously, means to maintain the hones in the same spaced relation at all times, a pair of convergent shafts associated With the hones, and a hone wheel, associated with one of said convergent shafts, whereby both hones will be operated simultaneously to and from the stone.

NELSON M. BAKER. 

